Journal cover Journal topic
Earth System Dynamics An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

IF value: 3.866
IF3.866
IF 5-year value: 4.135
IF 5-year
4.135
CiteScore value: 7.0
CiteScore
7.0
SNIP value: 1.182
SNIP1.182
IPP value: 3.86
IPP3.86
SJR value: 1.883
SJR1.883
Scimago H <br class='widget-line-break'>index value: 33
Scimago H
index
33
h5-index value: 30
h5-index30
Preprints
https://doi.org/10.5194/esdd-3-391-2012
© Author(s) 2012. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/esdd-3-391-2012
© Author(s) 2012. This work is distributed under
the Creative Commons Attribution 3.0 License.

  02 May 2012

02 May 2012

Review status
This preprint was under review for the journal ESD but the revision was not accepted.

Power-law behavior in millennium climate simulations

S. V. Henriksson1,2, P. Räisänen1, J. Silen1, H. Järvinen1, and A. Laaksonen1,3 S. V. Henriksson et al.
  • 1Finnish Meteorological Institute, 00101 Helsinki, Finland
  • 2Department of Physics, University of Helsinki, 00014 Helsinki, Finland
  • 3Department of Physics, University of Kuopio, 70211 Kuopio, Finland

Abstract. Using a method of discrete Fourier transform with varying starting point and length of time window and the long time series provided by millennium Earth System Model simulations, we get good fits to power laws between two characteristic oscillatory timescales of the model climate: multidecadal (50–80 yr) and El Nino (3–6 yr) timescales. For global mean temperature, we fit β ~ 0.35 in a relation S(f) ~ f−β in a simulation without external climate forcing and β over 0.7 in a simulation with external forcing included. We also fit a power law with β ~ 8 to the narrow frequency range between El Nino frequencies and the Nyquist frequency. Regional variability in best-fit β is explored and the impact of choosing the frequency range on the result is illustrated. When all resolved frequencies are used, land areas seem to have lower βs than ocean areas on average, but when fits are restricted to frequencies below 1/(6 yr), this difference disappears, while regional differences still remain. Results compare well with measurements both for global mean temperature and for the Central England temperature record.

S. V. Henriksson et al.

Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement

Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement

S. V. Henriksson et al.

S. V. Henriksson et al.

Viewed

Total article views: 1,278 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
797 396 85 1,278 78 84
  • HTML: 797
  • PDF: 396
  • XML: 85
  • Total: 1,278
  • BibTeX: 78
  • EndNote: 84
Views and downloads (calculated since 01 Feb 2013)
Cumulative views and downloads (calculated since 01 Feb 2013)

Cited

Saved

Discussed

No discussed metrics found.
Latest update: 02 Dec 2020
Publications Copernicus
Download
Citation
Altmetrics